Gaterboy and Porcupine

From Ben10versepedia

Gaterboy and Porcupine are two mutant brothers turned pro-wrestlers. Both have, through unknown methods, gained animalistic attributes as suggested by their names (it is hinted to be genetic). They became involved with organized crime, and were forced to compete in wrestling matches in order to obtain the needed money to save their mother and their farm. After Ben won the competition, he ended up aiding them to save their mother and turned over the prize money.